CN1373881A - Method and device for managing pixel transmission - Google Patents

Abstract

The invention concerns a method and a device for transmitting pixels (Pi) from a succession of input pixels expressing the evolution of an inking. The invention is characterised in that, prior to the pixel (Pi) transmission, it consists in selectively eliminating pixels of said succession such that the minimum interval between two successive transmitted pixels is greater than a predetermined threshold (Smin). The invention also concerns a method and a device for receiving said transmitted pixels.

Description

Method and device that managing pixel sends

The invention technical field:

The invention relates to a kind of graphical data operation, for example to the management of the data of the pixel form of expressing displaypattern.Particularly (but being not limited to), the present invention can be applied in from a source, and for example the pixel generation device transmits pixel at least one display device.The fax writing station of one group of interactive communication can be that the typical case that such pixel transmits uses.Under this situation, need its sensor pad of device (sensitivepad) under real-time management and transmission and the sending mode to go up person's handwriting and make progress corresponding pixel, same person's handwriting must produce on the screen of described device under receiving mode the while.

The general introduction of related prior art:

In many application, the detection of coordinates of pixels is to utilize one physically to reach the device that is linked to display screen functionally and form an interactive screen, the useful zone of display screen is as with pen input data (person's handwriting for example, depict or the like) write pad, perhaps be used for from the function of display screen selection catalogue demonstration, image-type instruction or the like.In this configuration, the coordinates of pixels that input media is imported is configured to the demonstration coordinate of corresponding display screen, makes result displayed and the data consistent of obtaining.

Based on mutual application, focusing on of making great efforts at present reduced as far as possible and produced figure from the transmission source and appear at time (dead time) the display screen target location to this figure, forms combination in order by several during this period of time:

The detecting of coordinate arrangement for detecting and reaction time, the mobile air coordinates (for example rectangular coordinate, polar coordinates) that converts to that will depict means (for example pen, slide-mouse, pointer).

Computing unit converts coordinate to according to known agreement a succession of data of respective pixel;

Transmit pixel data to the time that receives display screen;

Receiving trap is analyzed this pixel data, and converts the time of the available command signal of display screen to; And

Display screen is responded the time of this command signal.

Yet, with regard to present technology, based on basic physical restriction and can't reduce or compress the composition that comprises during this period of time.

Link composition that pixel transmits and link along with the data of using transmit and change widely, it is subject to the bandwidth of binding, and representative here links the data volume that time per unit institute can transmit, and this data volume increases along with bandwidth and becomes greatly.

In an interactive screen, the transmission of pixel is to occur in from the coordinate of obtaining to produce between the calculation element and display screen of pixel data, if itself comprises calculation element display screen, then this transmission will be carried out along the bus of interactive screen inside, if calculation element is in display screen place portion, then transmitting is that externally bus is carried out.The bus of indication in both of these case (after this being called local bus) can provide the bus that transmits pixel, particularly block form fast.

On the other hand, when the pixel that is formed by deriving means must be delivered to the outside at least one display screen of device when (after this being called the far-end screen), be not to link data fast forever, therefore, get back to the example that one group of communication fax writes (tele-writing) device, generally speaking the foundation that links between the device be to see through telephone network, and the data speed that the serial of its composition links is slow compared with the data speed of data processing bus.

It also is possible linking or transmit pixel with infrared ray by radio, yet the data speed of this mode also is slower.

Therefore occurred transmitting the bandwidth that links for pixel and utilized comparatively fully, this is for no other reason than that these bindings are just not slow in essence, and being both also is in order to link faster.Or rather, even the latter, for example above-mentioned internal bus is not saturated in normal pixel transport process, and they still help more economical utilized bandwidth better working condition to be provided or extra function is provided.

Description of the invention:

Therefore, the purpose of this invention is to provide a kind of management method and device of pixel, can use the bandwidth of link more fully.

In order to reach this purpose, the invention provides the method that transmits pixel a kind of pixel of a succession of expression person's handwriting progress of obtaining from input end, its characteristics were before sending pixel, optionally eliminate the pixel in this crossview element, thereby make secondary transmit the critical value of the minimum interval between the pixel continuously greater than predetermined critical.

By this way, only just send the pixel of person's handwriting when person's handwriting has tangible spatial variations, it is possible saving the shared bandwidth of pixel of sending person's handwriting in this way.Or rather, if the critical value predetermined in its spatial variations of pixel of the obtained continuous quadratic of input is little, it is obvious inadequately to be used as the entrained information of one of these pixels (last pixel of generation), and the sufficient reason of its transmission can't be provided.

In preferred embodiment, above-mentioned critical value is to calculate and represent according to the basic stride between the pixel that occurs at display screen, and this should be understood that in this article indication herein forms the mode of preset critical and can also use other parameter:

-at a known screen or image carrier (this screen is analogous to for example cathode-ray tube (CRT) in essence), the perhaps absolute distance between the pixel of printing off on the page or leaf.

-obtain the distance of representing with basic stride of coordinate plane, it is employed different with display to obtain the network (mesh) that coordinate plane has.In this case, it is only relevant with the scale factor to obtain the conversion of minimum interval between plane and the display surface.

-when deriving means with the speed (for example function that changes with person's handwriting) of change when position data is provided, perhaps when these devices be to be operated in Asynchronous Mode following time, obtain the time interval with respect to the master data of person's handwriting.In this case, above-mentioned interval equals the interval between the pixel on the display plane.

In addition, can be considered be to change in two-dimensional space or three-dimensional plane to this person's handwriting.Reason based on simplifying below will be described with the example of two-dimensional space, and those skilled in the art should be by being applied to three dimensions via instruction of the present invention.

Interval between two pixels can be analyzed from several different schemes, for example, and two continuous pixel Pr that obtain at input end and Pi, cartesian corrdinate on image plane is respectively (Xar, Yar) with (Xai, Yai), the interval Sri between the two can estimate for:

Absolute distance on the-coordinate plane (for example display plane) is anticipated promptly Sri={Xar-Xai} ²+ (Yar-Yqi) ²} ^1/2Perhaps

-one of them interval in selecting arbitrarily to form, meaning promptly according to wherein maximal value or minimum value decision Sri=|Xar-Xai| or | Yar-Yai|.

-with | Xar-Xai| or | the expression of Yar-Yai| one of them or other at interval, it is to depend on that what person is maximal value or minimum value.

Therefore, in one embodiment of the present of invention, be according to setting up locations of pixels,, just surpass minimum interval as if the critical value of presetting greater than this parameter in difference one of them in above-mentioned parameter of two contiguous pixels numerical value corresponding to the pairing numerical value of the parameter in the coordinate system.

Preferably, pixel is to perform an analysis with Cartesian plane or space, and parameter is X and Building Y mark, and the situation that surpasses the minimum interval between continuous two pixel Pr and the Pi is:

DXri=|Xar-Yai|＞DXmin or

DYir=|Yar-Yai|＞DYmin wherein Xar and Xai is respectively the Building X scale value of two contiguous pixels, and Yar and Yai are respectively the Building Y scale value of two contiguous pixels, and DXmin and DYmin are respectively to the critical value of Building X mark with Building Y mark decision.

Minimum interval Smin between two pixels that transmit continuously, DXmin or DYmin are greater than at the n of the basic spacing between adjacent two pixels on the display plane doubly, wherein n be one more than or equal to 1,2 or 4 integer, perhaps according to the numerical value of other application, default critical value Smin, DXmin or DYmin are healed (representing with above-mentioned numerical value n) greatly herein, just the pixel of person's handwriting is represented in the utilized bandwidth transmission economically of healing, and just resolution is slightly influential.Observed out the present invention according to the research that the applicant did and to have utilized bandwidth economically, and do not influenced resolution, and do not needed complicated reckoning calculation rule in the pixel-by-pixel basis receiving end.By linking each space between two contiguous pixels, use known technology to form continuous person's handwriting and just can reach perfect results with straight-line segment.

Preferably, the pixel that is not eliminated is transmitted by the packet with at least one pixel, first pixel that obtains in the separation packet and the time of last pixel are to be less than or equal to default time critical values, under this situation, the reception of pixel is to carry out in batch mode, receives one or more pixels between a period of time.Each batch separated a time interval, and this time interval is to decide according to the time of obtaining each packet, and in the processing time and packet delivery time of transmitting terminal and receiving end.Requiring in the instant application of handling, particularly be presented on and obtain visual effect simultaneously on the display at sensing media generation person's handwriting with this person's handwriting, this time interval preferably should be less than the persistence of vision of human eye, this critical value should less than the persistence of vision of human eye what, be the time of depending on above-mentioned processing and transmission.In this technical field, confirmable is processing and delivery time and the time ratio that the obtains the pixel data bag quite little part of getting up only to account for, and improves this situation more and more for obviously along with technology.

Point out that according to a report persistence of vision of human eye is confirmed as 40 milliseconds, in certain embodiments of the present invention, this of short duration critical value is fixed on about 40 milliseconds, perhaps more can be less than 30 milliseconds, even 20 milliseconds.

The number of pixels that transmits in each packet can be different, or rather, if set the default time if separate first pixel and last pixel that obtain in the packet, this time equals above-mentioned time critical values at most, if follow mutually in a stabilized speed (in a continuous person's handwriting) in pixel that input end obtains, based on being to equal (at the number of pixels-1 of input end acquisition) to be multiplied by the fact of obtaining the time interval between two pixels during this period of time, this default time can convert the number that obtains pixel at input end to.Therefore, based on a known pixel acquisition time, form the pixel quantity that data are surrounded by a maximum, if standard according to the present invention does not have pixel to be eliminated, then packet just holds this maximum pixel quantity, perhaps hold less than this peaked any amount of pixel, described quantity depends on the number of picture elements that is eliminated.

In a preferred embodiment, the corresponding pixel that forms one section continuous person's handwriting of the pixel of each packet, therefore, the content of each packet comprises such information recessively, i.e. all pixels that representative wherein comprises must link to reappear the person's handwriting that these pixels are concerned mutually.In other words,, in the packet of same transmission pixel, the situation of recovering person's handwriting after interrupting can not be arranged, as know again and describing that this step provides the data of more efficient management transmission describing in detail according to this embodiment.

Preferably, the pixel of each packet is formatted into a pixel message, can oneself send and when receiving, solve data, one of advantage of this step is can allow between two pixels, except pixel, insert the message that comprises data, according to the agreement of setting up in advance, these other data also can be formatted into the form of packet.When first pixel in second message of last pixel binding of first message in two pixel message showed continuous person's handwriting, this comprised the message of other data even can be inserted between two pixel message.Or rather, transmit the message comprise data except pixel can be obtain the pixel of forming second pixel message during in carry out.

In fact might (narrate) some message and can and manage the insertion of these other data in more clever mode than other message short (deciding) according to the pixel of eliminating as above, further, the time interval that the packet that the time interval that the packet that pixel message includes less pixel occupies includes more number of pixels than a message occupies is little, therefore can hold the longer message that includes other data.

The priority of specific data bag also is possible in addition, for example by the highest right of priority is given the packet that comprises pixel message, so that keep instant demonstration (as the perception of human eye institute).

In the agreement of implementing preferred embodiment, pixel message comprises that an identification field points out that it comprises pixel data, it can add an amount field and be included in number of pixels in the message with explanation, and this identification field and amount field can form the start-up portion of this pixel message.

Preferably, each pixel message comprises that data point out last pixel of the previous message whether first pixel of information is linked to.

As for the pixel in message itself, each pixel of sending can comprise that one first field points out whether this pixel will be linked to the previous pixel of sending, one second field list is shown in first coordinate on the display plane, and one the 3rd field list is shown in second coordinate on this display plane.

In this example, preferred first field can be integrated at least one bit of the byte of expression first or second coordinate.

Preferably, in the group that is arranged at the pixel that receives continuously in the default acquisition time in the pixel obtained of input, and if in first group of pixel of a known person's handwriting, comprise first pixel of the start-up portion of a person's handwriting, then:

A) this first pixel is set at a reference pixel by the starting point, and other pixels in the group are set to the candidate pixel of sending being selected;

B), judge that spacing between reference pixel and the candidate picture is whether greater than default critical value for each continuous candidate pixel in the group;

C) if this spacing less than this critical distance, then this candidate pixel is eliminated;

D) if this spacing is not less than this critical value, this candidate pixel is selected transmission, and this pixel that is selected is set the new reference pixel as step b; And

E) this first pixel is sent with this candidate pixel of choosing.

Again, preferably, in the group that is arranged in the default acquisition time pixel that continued access continuously receives in the pixel obtained of input, and if one group of pixel immediately following after last group pixel, in person's handwriting, do not have discontinuous, then:

A. the pixel of sending at last of this last group of pixel is set at a reference pixel by the starting point, and the pixel of follow-up group then is configured to be selected the candidate pixel of sending;

B. for each continuous candidate pixel of present group, judge between reference pixel and candidate pixel spacing whether greater than default face range line from;

C. if this spacing less than this critical distance, then this candidate pixel is eliminated;

D. if this spacing is not less than this critical value, this candidate pixel is selected transmission, and this pixel that is selected is set the new reference pixel as step b; And

E. comprise that a series of of candidate pixel that are selected in this group are sent, it is instructed to first pixel of this series is linked to last pixel of last group of pixel.

Similarly, be arranged at when the pixel of being obtained in an input in the group of the pixel that receives continuously in the acquisition time of presetting, if and under the situation of interrupting continuous pixel, in the end only obtain a pixel in an interrupted acquisition time, then this single pixel sent methodically.

In typical application of the present invention, this person's handwriting is to produce an interactive screen, this interactive screen comprises that a display screen and a coordinate deriving means are integrated into this display screen, the pixel of obtaining in an input is to obtain from the position data that this coordinate deriving means is provided, and the pixel of this transmission is to be received by this display screen.

This pixel of sending can be sent to one with the remote receiving end in source of the pixel of obtaining in input.

The pixel of delivering at least one receiving end then can be to link transmission, for example telephone wire with serial.

The method can be used to connect the fax writing station of at least two communications.

The present invention also about a kind of method that receives the pixel that transmits according to any one above-mentioned feature selecting ground, comprises the following steps:

A. receive the pixel that each is sent;

B. if the pixel of a series of reception, decision must link together to form the pixel of a continuous person's handwriting; And

C. for each pixel that will be bonded, produce a straight-line segment and link this pixel, so that wanting to form a continuous person's handwriting between connected this pixel extremely in this a series of previous pixel.

Send the device of pixel a succession of pixel that the present invention also changes about a kind of expression person's handwriting that obtains from input, it is characterized in that it comprises:

The device of the space interval of judgement between contiguous pixels and this a succession of pixel; And

Optionally eliminate the device of this a succession of pixel, make minimum interval between two contiguous pixels of sending greater than a critical value of setting.

Feature according to transmission pixel method of the present invention can provide necessary change to this device, no longer repeats based on succinct reason.

The present invention is also about a kind of fax writing station that comprises the dispensing device of above-mentioned form.

At last, the present invention also about a kind of device that receives the pixel that optionally transmits according to above-mentioned method, comprising:

A. receive the device of each pixel of sending;

B. if the pixel of a series of reception, the pixel that decision must link together is to form the device of a continuous person's handwriting; And

C. for each pixel that will be bonded, produce a straight-line segment and link this pixel in this a series of previous pixel, so that at the device of wanting to form between connected this pixel a continuous person's handwriting.

The accompanying drawing simple declaration:

For a person skilled in the art, cooperate the accompanying drawing of following from following being described in detail, the present invention can more clearly be understood, and its above-mentioned and other purpose and advantage will become more obvious.Wherein:

Fig. 1 demonstrates two fax writing stations simply via the telephone network communication.

Fig. 2 is a calcspar, shows the inner structure of fax writing station shown in Figure 1.

Fig. 3 describes Fig. 1 as a data input coordinate plane and a relation that shows between the coordinate plane.

Fig. 4 shows the data structure that forms pixel according to a preferred embodiment of the present invention.

Fig. 5 shows the framework according to a preferred embodiment of the present invention one pixel message.

Fig. 6 shows the content of different bytes in the message that forms Fig. 5.

Person's handwriting on Fig. 7 displayed map 1 shown device causes the start-up portion in the corresponding pixel message.

Fig. 8 is a process flow diagram, shows the step that obtains location coordinate and this location coordinate is converted to pixel according to the present invention.

Fig. 9 describes the action that a processor in the device shown in Figure 2 converts the coordinate of input to the data that form a pixel.

Figure 10 a and Figure 10 b are process flow diagrams, show according to the present invention to select pixel to form the action of the pixel message that will send out demonstration in one preferred embodiment.

Figure 11 describes the action that its processor is carried out in the device shown in Figure 2 when the step of carrying out shown in the process flow diagram shown in Figure 10 a.

Figure 12 a and Figure 12 b describe the part of person's handwriting shown in Figure 7 in detail, show that this carries out the option program of pixel at interval according to two kinds of possible certain between pixel of variation of preferred embodiment.

Figure 13 is an action flow chart of sending the first pixel message.

Figure 14 represents the demonstration of writing to comprise two person's handwritings that separate that one of them comprises part person's handwriting shown in Figure 7.

Figure 15 is management and the action flow chart that sends a pixel message, and this pixel message is had no progeny in input except a reference pixel, includes only a pixel of choosing.

Figure 16 is management and the action flow chart that sends pixel message, and this pixel message is had no progeny in input except one with reference to the element, also comprises a plurality of pixels of choosing.

Figure 17 is the action flow chart of a display pixel message, the pixel message before not having to link.

Figure 18 is the action flow chart of a display pixel message, the message before it is linked to.Detailed description of the invention:

Fig. 1 shows the example of the embodiment that relevant fax according to the present invention writes briefly, and it itself is a kind of known technology that fax writes, and can allow to send and receive instant person's handwriting in interconnective terminal.

Show two terminal 2a that fax writes in the example of describing, 2b links together via telecommunication network (public telephone network) 4, each terminal comprises a panel 6a, 6b forms an interactive screen, and the latter has as the sensitive surface of coordinates of input devices and the dual-use function of display screen.In this example, interactive screen (generally referring to Fig. 6) is to cover one deck sensing film on the liquid crystal type flat-panel screens, one 8 or other similar articles institute's applied pressure on any point of film are to find out its position by resistive in the film or capacitive sensing device, so that obtain the suitable position of contact point from the latter, with X, mark plane, Building Y represents that it is " contact sensing display panel " (after this being referred to as panel) that this interactive screen is known usually

Control electronic circuit-further descriptions-permissions correspondence 8 shows person's handwriting in time in the contact on the panel on the surface of panel 6a and 6b, just look like that the person's handwriting that draws on a piece of paper is the same.

Can appear at the person's handwriting that produces on the panel 6a on the panel 6b of device 2b of panel 6a and connection.Because the fax writing station can move with full-duplex mode, any one panel 6a or 6b all can produce pen 8 formed person's handwritings simultaneously to be changed, and this person's handwriting changes the terminal that remains in another connection.

The fax writing station also provides typical telephony feature, meaning promptly, the exchange of voice data, except about adding the possibility of electronic data communication the data of person's handwriting, this must decide on its complexity.For example, shown terminal 2a, each comprises a microphone 10 and a typical telelecture 12 and an a kind of integrated disc driver 14 2b.

Provide different connectivity port and internal datas to store and treating apparatus, terminal shown in the figure also can be formed the communication hub (hub) of computing, can be linked to different data processing equipments, PC for example, electronic organizers (electronic organizers), electronic camera (electronic cameras), medical treatment or scientific instrument or the like.The graph data that exchange image or literal and image are formed also is possible, and this can add person's handwriting by the means of pen 8, for example adds the note of file, perhaps revises image.

For these are actually useful possibility, they can be utilized immediately.On this one deck meaning, instant notion should be understood that to be illustrated in and produce vision content on the screen of a dispensing device and the same appearance of content on the screen of receiving trap is simultaneously or almost simultaneously.The person's handwriting on screen, this vision content is formed with the variation of image or literal archives, for example is used for animation and represents, perhaps skips in order to simulate.

This instant demand is to the resource of terminal and in the pixel data source and show that coupling arrangement has proposed extra demand between the display screen of these data.

Resource about terminal, the treating apparatus that the instant messages managerial demand is powerful, because its funtion part that just is not linked to application (the particularly management of sensing panel) that need handle, but also comprise the input and the output of the distinct interface that may connect, let alone with line on other-end link communication.

Because these situations, this case applicant has proposed No. 952 a kind of fax of patent of french patent application case FR-A-2770 and has write terminal, and the framework of particularly suitable that can be by having two or three processors (needing and the work carried out decide on embodiment) makes the instant data optimization of processing.

For the narration below the present invention, the example of embodiment should be based on a such terminal, therefore, the content that will be understood that 770 No. 952 patent application cases of FR-A-2 fully adds the present invention as a reference, this particularly suitable to all for the influential part of communication between the device, for example call out agreement, the affirmation of instruction, the data of coming in, the management in different communication stage or the like.Yet, in order to help to understand following narration, not having for scope of the present invention under the prerequisite of too many restriction, the viewpoint that should look back 770 No. 952 patent application cases of FR-A-2 is to help understanding.Recently, the present invention needs the field of pixel management that application is arranged at all.

Fig. 2 is a calcspar, and it shows according to 770 No. 952 patent application cases one of FR-A-2 and writes the common framework of end device based on embodiment one fax of three processors.

Except being linked to the communication of telephone wire, whole work is to be managed by two processors: mainly in order to management input and output port, one second processor 22 is mainly used to the management as utilization to a first processor 20, comprises the action of sensing panel 6.

These two processors 20 and 22 are connected to the data of the 3rd processor 24, the three processors, 24 management switched message networks 4 or digital circuit (for example ISDN) respectively by a pair of bidirectional bus B1 and B1.The management function that the 3rd processor 24 (being called Communication processor again) is incited somebody to action the audio function binding of concrete and terminal extraly combines, particularly the telephony aspect.For this purpose, it comprises and is used for microphone 10 and loudspeaker 12, and the interface of telephone receiver 27, guarantees by the binding of socket 26 with network 4.

In addition, first and second processor 20 and 22 is directly to be connected to each other with one the 3rd bidirectional bus B3.

Therefore, these three bus B 1, B2 with B3 make these three processors 20,22 and 24 any one of them directly with other two-way ground of processor communication datas.

In this example, first processor 20 (being also referred to as the I/O processor) management is about external disk drive 28, one hard disk drive 30 (be integrated in inside or externally), the data traffic of one printer 32 and a serial link 34, and its pilot lamp 36 by control desk provides the state of the different device of its control of indication.

Second processor 22 (being also referred to as application processor) is not only managed sensing panel 6, but also the inside of managerial demand processes pixel or external module, therefore, application processor 22 cooperates scanner 38 and fingerprint to read in machine 40 in this example.Based on commercial cause, application processor 22 also managing electronic transaction card reads in machine 42 and keyboard 44, and the latter is the form that for example is integrated into the touch sensitive keyboard of sensing panel 6.

Because 3 processors 20,22 are different with 24 work of specially taking charge of, and can carry out multinomial work immediately side by side, thereby can make the optimization of utilizing of communication network 4 data traffics.

Yet the possibility of the instant action that end device 2 is different is the capacity that is limited in communication network.Further say, a telephone wire, even a digital circuit, its bandwidth that has (being the parameter that is expressed as the digital bit fluxion in this example) is much smaller than the employed data transmission bus of data processing.With regard to present case, the present data speed of digital telephone circuit of an ISDN form is limited in 56 to 64 kilobits/second (kbit/second), and uses the bus in data processing to allow data speed to surpass 100 megabyte per seconds (bytes/second) at present.

Therefore, relevant transmission can be benefited from device of the present invention corresponding to the situation of the device (for example at No. 952 described devices of patent application case of FR-A-2270) of the data of pixel, because device of the present invention allows institute's data quantity transmitted of a transmission line (a for example telephone wire) to reduce, and can not make the amount of transmission information that tangible loss is arranged.

The example of such device in one preferred embodiment should be described now according to the present invention.In this manual, aspect of representing with the flow process form or feature also can be understood from the device that is used for implementing this flow process.Similarly, the description of carrying out from institute's angle of device (material or software) also can be understood by the action that these devices are produced.

In this preferred embodiment, consider that two fax of communication write terminal 2a, 2b, the pixel that is drawn in the person's handwriting on the sensing panel 6 of a terminal 2a (transmitting terminal) with expression to the data of another terminal 2b (receiving end) transmit.Those skilled in the art can reason out other embodiment easily from the instruction of this embodiment, for example link together more than 2 terminals, with/or two or more terminal distinctly send the pixel of its corresponding person's handwriting.

As what will explain in detail, according to the present invention, only show variation (from the viewpoint of position), and when to judge with pixel that transmits before or the pixel that is about to transmit be tangible by comparison at person's handwriting, then send terminal 2a transmission about the pixel of this person's handwriting to receiving terminal 2b.

In order more to understand the person's handwriting of mentioning in this example, pixel and position please refer to shown in Figure 3ly, and it demonstrates briefly, and it obtains and be presented at the coordinate plane on the screen about the data of person's handwriting.

Mentioned before looking back, sensing panel 6 constitutes one and shows display screen, and for example a LCDs is covered with a position sensor, for example a transparent capacitive film.A position sensor like this is to be well known to those skilled in the art, and it generally includes capacitance or resistance value between the reference point on the MEASUREMENTS OF THIN (pen exert pressure institute produce), represents the device of the position on axes of coordinates.The mobile position of finding out pen 8 and its present variation of putting on the position that can be instant of pen 8 on measurement mechanism.

It should be noted that, display screen also is placed on position suitable in the coordinate system with the pixel that shows, in this example, the foundation of coordinate system is the position that defines display dot by crossed electrode, yet this position sensor needn't have identical resolution with the employed coordinate system of display screen.

In Fig. 3, sensing panel 6 is divided into card flute (right angle) coordinate plane Sc and Sa, each coordinate plane has same useful zone (equaling the useful zone of panel), respectively as position detection system with the position (meaning is a sensor) of detecting pen 8 and the pixel that shows person's handwriting.

Planar S c and Sa include oneself the x axle and the y axle to define its each other coordinate.

In the usual course, (Xci Yci) refers on the coordinate system of sensor the coordinate of pen 8 to Ci, and wherein i is an integer, and it is illustrated in the order of coordinate in the coordinate of a succession of input.

Similarly, Ai (Xai, Yai) the most close above-mentioned coordinate Ci (Xci, the coordinate of pixel Pi Yci) on the display screen.

For in the physical location of pen 8 and to obtaining preferable relevance between the locations of pixels of position display, the impression that just causes pen on a piece of paper, to move, position sensor must have the resolution of a maximum, and it is equal to or greater than the resolution of display screen.

Therefore, the demonstration of person's handwriting on screen need with coordinate Ci (Xci, Yci) convert to coordinate Ai on the display screen (Xai, Yai).The conversion method itself that adopts is a called optical imaging, and can be by simple and brief outline.

Make (comparison diagram 3):

Xma is the Building X mark of display screen maximum.

Yma is the Building Y mark of display screen maximum.

Xmc is the Building X mark of position sensor maximum.

Ymc is the Building Y mark of position sensor maximum.

Then the coordinate Ai of sensor display position (Xai Yai) can obtain from following formula:

Xai=Xci.Xma/Xmc and

Yai＝Yci.Yma/Ymc

Because a person's handwriting is to be formed by a succession of continuous pixel, therefore must detect a position of 8 continuously and the pixel of correspondence is presented on the screen, the frequency of demonstration is that the inside clock pulse by driving electronics (drive electronics) decides.The frequency of these actions (after this be called pixel and obtain frequency, perhaps be called for short and obtain frequency) depends on different parameters, and these parameters comprise:

The reaction time of-position sensor,

The reaction time of-display screen,

The driving electronics of-sensing panel 6 and the reaction time of carrying out the processor of coordinate switching motion.

-operation or work standard: the maximum translational speed of contemplated pen, the accuracy of following person's handwriting of hope, estimation that vision stops or the like.

When pen 8 continuous when mobile at position sensor, position sensor send a succession of continuous coordinate Ci (Xci, Yci).According to pen 8 on sense plane translational speed and obtain frequency, two coordinate Ci (Xci that get access to continuously, Yci) Ci+1 (Xci+1, Yci+1) can produce two corresponding pixel Pi and Pi+1, these two pixels are not contiguous on display screen, so it has caused effect shown in dotted line.

In order to obtain presenting continuously of this line, thereby must between the continuity point of two non-vicinities, form one and link.Connect the two and just can between these two pixel Pi and Pi+1, form binding by inserting a straight-line segment.After this this action is called " pixel binding routine ", perhaps is condensed to be " binding routine ".

This routine need be calculated each display dot X and the Building Y mark that forms this straight line portion, and to show this straight line, the calculating of straight line portion is to be well known to those skilled in the art, so only concise and to the point here general introduction:

Make

Xao is the scorching Building X mark that shows of first acquisition point.

Yao is the Building Y mark of the demonstration of first acquisition point.

Xap is the Building X mark of the demonstration of second acquisition point.

Yap is the Building X mark of the demonstration of second acquisition point.

The coordinate of display dot can be tried to achieve from following formula in the middle of each:

Ya(j)＝[(Yap-Yao)/(Xap-Xao].Xa(j)；

Wherein Xa (j) represents the abscissa of intermediate point, the ordinate of Ya (j) expression intermediate point.

For all intermediate point j, this calculates every heavy covering once, and parameter j increases by 1.(with respect to arriving) by next pixel of the straight line of calculating.

Work as j=0, Xa (1)=Xa0+1 then, when Xa (j)=Xap, this calculates end.

In addition, what should illustrate further is whether position sensor provides an activation signal CS stylus 8 to contact with the sensing panel.In this example, when pen 8 contacted with the sensing panel, signal CS was at logical one, on the contrary then signal CS at logical zero.

Should be appreciated that pen 8 demonstrations of point on screen at the sensing panel can meet two kinds of situations in a known moment:

I) demonstration of person's handwriting continuously (straight line or the curve that do not have interruption), this continuous person's handwriting originates in pen 8 and contacts with the sensing panel for the first time.In this case, sensor is sent a series of point with the speed of obtaining (by obtaining fixed-frequency), and each point is that (its activation signal CS is logical one continuously for Xci, form Yci) with Ci.This signal is when person's handwriting finishes continuously, and just pen 8 is mentioned, and obtains the last time after the coordinate of this person's handwriting, becomes logical zero again.

" contact is just left: (for example on the taps screen a bit) then the just position of pen 8 that shows if ii) pen 8 is shown just.In this case, sensor only send a pair of coordinate (Xci, Yci), i.e. the coordinate of corresponding contact point, activation signal CS maintains logical zero.

Next each pixel Pi that delivers to display screen defines with following three fields:

After this-one data are called " link indication " BL, and (Xia Yia) should link with the Pi-1 that sends before to indicate the demonstration coordinate Ai of pixel Pi clearly.This connects indication BL and can directly be obtained by activation signal CS;

-coordinate Xai,

-coordinate Yai.

The combination of these three fields, defined in the person's handwriting that pen 8 goes out location of pixels with and the background context of position, be called as " pixel data " or be abbreviated as " pixel ", this title of pixel is used for indicating its composition data and the vision on screen presents.

In this example, the systematic parameter of sensing panel 6 is as described below:

-at the interval that obtains between two coordinates; 1ms (millisecond).

(just 1kHz obtain frequency);

The resolution of position sensor: 1024 horizontal unit increment (Xc coordinate) increments of vertical unit with 1024 (Yc coordinate).

The sharpness of display screen (color monitor of lcd technology): 1024 pixels of every row (Xa coordinate), 768 pixels of every row (Ya coordinate).

Using the structure of pixel data in this example is to describe as shown in Figure 4 briefly.

In the example of Fig. 4, aforesaid three fields occur continuously, form a pixel together, and it originates in first field, 52, the first fields 52 and comprises the binding indication.Based on it is a kind of form that is/denys, and the data that first field 52 is transmitted are to represent with single binary bit bit, and what person it determines follow with bit BL.Generally speaking, be must be connected to previous pixel in logical one (BL=1) expression to pixel that should bit with bit BL on screen, to form a straight line part.When bit BL is logical zero, then represent this bit to the pixel of pixel before must not linking of celebrating.In other words BL=0 is illustrated in discrete point in the person's handwriting: last point of person's handwriting be the position in previous pixel, the starting point of a new person's handwriting then is positioned at the pixel that its field 52 has comprised bit BL=0.

Second field 54 defines the Xai coordinate of pixel Pi with the elementary cell number, meaning promptly, show along X from initial point 0,0 beginning axle contiguous pixels number.It comprises a series of bit, forms a binary digit ix corresponding to this number of unit.In this example, its scope of the value of this digital ix is 0≤ix＜1024.

Similarly, the 3rd field 56 defines the Yai coordinate of pixel Pi with the elementary cell number.Meaning promptly, show along X from initial point 0,0 beginning axle contiguous pixels number.It comprises a series of bit, forms the binary digit ix of a corresponding described number of unit.In this example, its scope of the value of this digital ix is 0≤iy＜768.

In this example, two bytes have been prepared for each of field 54 and field 56.

Based on considering of reality, first field 52 that comprises single binding indication bit BL is integrated into second field 54.More particularly, the position of last bit of second field 54 (having the highest effective bit in the byte of highest weighting) kept by linking indication BL.

Such arrangement is favourable, because in data management and transmission system, different data processing units uses byte (eight bit byte) as minimum base unit.Now, represent the bit number of the highest Building X scale value Xma, promptly several 1023, be equivalent to 10 bits.Thereby must distribute two bytes (eight bit byte) to give second (Building X mark) field 54, even the highest significant bit in the most significant byte is not used to illustrate this coordinate.Give one of these high significant bits with certain function will way will exclude can only be used in other cases keeping and link the needs that the extra byte of indicating BL realizes pixel data 50 with one.

Be noted that, must be expressed as the Building Y mark of 768 possibility numerical value, also need its field 56 to comprise two bytes (eight bit byte), a byte is restricted to 256 different numerical value.Therefore, this can be understood that similarly first field keeps one of high significant bit in the most significant byte of one the 3rd field.

Pixel Pi is sent with the form of the pixel group that is selected, and each group forms a pixel message MPk, and index k is an integer, is illustrated in the rank of this Pixel Information in a series of Pixel Information, and it originates in k=1.According to the present invention, the pixel quantity that is selected in a pixel message MPk is variable, and this will lay down a definition after a while again.Each pixel message MPk manages in idiopathic mode, its scope is can be processed into a packet at pixel message MPk in chain, as (instruction message is from the data block of separate sources in cocommutative other message of a data line, acknowledge message, or the like).

It should be noted that in this stage that all the pixel P in same pixel message are attached at together, in other words, do not having a part of being interrupted in the person's handwriting that the pixel in the same pixel message is equivalent to draw.

The structure of one pixel message is as shown in Figure 5, and herein, this message comprises mk pixel, and each pixel has the described structure as Fig. 4.Under general situation, the number of pixels in a pixel message marks with mk.

Pixel message MPk comprises part 58 at the beginning, is positioned at before the data corresponding to this mk pixel, and this begins part 58 and comprises two fields:

-one " in proper order " field 60 is pointed out the information that comprises pixel that will show.

-one number field 62 points out to be included in the number of pixels mk among the pixel message MPk.

In this example, the number mk that is located at the pixel that comprises in the pixel message in advance can not surpass 16.And, in order to discern the message that comprises Pixel Information apace, comprised in the message that four specific bits begin part, therefore guarantee the instant processing of message identification agreement.

Pairing data are immediately following after beginning part 58 in the pixel.

Fig. 6 at length shows the configuration of pixel message shown in Figure 5.

In this drawing, pixel message MPk is that the mode with form presents, the corresponding byte (eight bit byte) of each row, form each byte 8 bits (indicate D0, D1, D2......D7) different rows in form is pointed out respectively.D0 is a least significant bit (LSB), and D7 is a highest significant position.Yet, cause for the purpose of simplifying the description, having only the bit of being mentioned especially in the following description is identifiable in this form.

Notice that the sign of bit D0 to D7 is useful in that each bit divides other position in the general byte, in a byte, the composition of the specific binary bit that position D0 to D7 is comprised is to be identified as bit according to itself appointment.

The order of sending byte be from form from top to bottom.In the situation of a continuous binding, for example, in communication network 4, the order that the bit of each byte is sent is from the right to the left side (be D0 after following send D1).

Preceding four bit np0 in first byte of pixel message MPk, np1, np2, np3 (correspondence position D0 to D3 respectively), it is illustrated in the number mk of pixel P in this message according to a positive logic.Set logical one for by all bit np0 to np3 and can express maximal value 16.

Four highest significant position positions, back D4 to D7 is accounted for by binary bit character " 0001 " in the drawings in first byte.In the agreement of this example, this binary bit word is at random to set, and comprises pixel data to represent this message, and therefore, this same binary bit character should be able to appear at the same position among each pixel message MPk methodically.

For the coordinate Xa1 of first pixel, second byte is least significant byte, followed by the most significant byte (the 3rd byte) that is this coordinate values, and can be with the value of two byte representations corresponding to field 54.

As explained above, the maximal value of expression coordinate Xam does not need to use last the bit D7 in the most significant byte, and therefore this bit is used as the position that connects indication bit BL.

The 4th and the 5th byte are represented the value of the coordinate Ya1 of the first pixel P1 together in the message, they be respectively in this value minimum effectively with the highest effective byte, and then form the 3rd field 56 of pixel P1.

According to the account for same spline structure of four bytes (second to the 5th byte) of first pixel P1, second pixel P2 of message ensuing four bytes that account for, (the 6th to the 9th byte).

Yet, all pixel Pi that are selected follow in a coupling chain mutually in the predetermined same message, this can understand the second pixel P2 must link the first pixel P1, gu this, this second pixel P2 needn't comprise a binding indication that is set in logical states BL=1, and the entrained information of this indication is impliedly given.Therefore, this position of second pixel is often referred to the binding of first field 52 indication, meaning promptly, the bit of the 5th its position of byte D7 tie up to " don ' t care " (no matter) state, this " don ' t care " state is to represent to make fork.

The 3rd pixel P3 of message has and second structure that pixel P2 is same, and it is directly followed after second pixel P2, accounts for the tenth to the 13 byte.Other pixel P3...... in the message, to last pixel Pmk, this message is with the most significant word section end of the Yam coordinate of its last pixel by last for Pmk.

Based on the same reason of explaining in the situation of the plain P2 of pixel, follow all the pixel P2 this P1 of pixel after in the pixel message, it links that to indicate BL all be " don ' tcare " state P3......Pmk.

A. pixel, the selection of the transmission of structure and pixel message.

The action of processed pixels will be described now, and selected pixels is formed a pixel message in its a succession of position data that can be sent from the corresponding sensing panel of position sensor.

This description will be described with the example based on the part of person's handwriting T1 shown in Figure 7.

The part of person's handwriting T1 here is the equal of the beginning of person's handwriting, meaning promptly, it originates in pen 8 and sensing panel 6 initial position contacting C1 (Xc1, Yc1) up to no longer contact, under a such situation, with when position C1 on the panel contacts, the activation signal CS that sensing panel 6 is sent is transformed into logical one (positive logic) by logical zero at pen.

The part of person's handwriting T1 is that pen 8 moves on panel 6 and do not leave institute and produce, thereby this activation signal CS keeps logical one in this person's handwriting the time partly.

As described above, the internal drive electronic circuit of panel 6 is in the position of the time sampling pen 8 of rule, and in sampling each time, send pen 8 instant coordinate Ci (Xci, Yci).Note, even it is always the same to the time interval between the sampling of twice continuous coordinate points, Ci (Xci, Yci) with Ci+1 (Xci+1, Yci+1) distance between is not all identical, this is because distance is to depend on pen 8 speed that move (this may in the course of action of person's handwriting to some extent change), and between these 2 the path of person's handwriting.

In this example, (Xcp, Ycp) (wherein p and q are integer to any two point coordinates Cp that separate, and p ≠ q for Xcq, the Ycq) distance between, are defined as connecting the straight length of this two coordinate with Cq.

The continuous coordinate C1 that during a person's handwriting, detects, C2, C3 handles in continuous square, and each square comprises the preset number of a continuous coordinate.This number equals 16 at example before, corresponding to a data block acquisition time cycle tab, does not surpass the time (being 20ms) that human eye vision persists.The reason of this selection is to be in fact to send together its corresponding pixel message from the information that these coordinate datas obtained, this means first coordinate that wait to survey square with first of pixel message that should square is selected one time of delay between the pixel showing on the screen, this time equals acquisition time period T ab at least, therefore, by limiting this time to the time that approximates the persistence of vision of human eye greatly, pen 8 positions instantaneous and corresponding shows between the end of person's handwriting in the influence of the time delay of sensing panel to be discovered hardly.Such consideration is applicable to that similarly pixel message directly delivers to the display screen that is integrated into the sensing panel (pen 8 moves) on sensing panel 6, delivers to one or more far-end screens as pixel message.

Should describe now and handle coordinate information and from method and the means of this information display pixel on screen, this description is for the different situations that produce person's handwriting at the sensing panel.The beginning of A1, person's handwriting: form first pixel message MP1

This example is to explain with the action that Fig. 8 to Figure 12 will describe by person's handwriting T1 part shown in Figure 7, and wherein Fig. 8 to Figure 12 is when forming pixel message MPk, step and action that application processor 22 is carried out.

The information that application processor 22 receives from position sensor, this information comprises that on the one hand (Xci Yci), comprises an activation signal CS (step e 2 of Fig. 8) to coordinate Ci on the other hand.

(Xci, in the time of Yci), application processor 22 produces a corresponding pixel Pi (step e 4) obtaining coordinate Ci each time.As symbolistic description in Fig. 9, This move comprises that in fact (Xci, (Xai Yai), and sets one 8 indication Ci that contacts to the coordinate Ci that will obtain on the sensing panel, with the state of a reflection activation signal CS Yci) to convert demonstration coordinate Ai to.Like this each pixel Pi that obtains and then be stored to the first memory buffer MT1 (Fig. 9) (step e 6) of corresponding application processor 22.These pixels are formed the pixel (after this being referred to as candidate pixel) of selecting the candidate, form the part (step e 6) of pixel message.

Have same mesh (mesh) if please note the coordinate grid of position sensor and the coordinate grid of display screen, (Xci, Yci) (Xai should be the same Yai) to two coordinate Ci, and then the step of coordinate conversion is unnecessary with Ai.

Candidate pixel P is stored each time, and application processor debates just whether this is not incorporated into last pixel of memory buffer MT1.When one of two following situations, this pixel promptly is last pixel that is integrated into memory buffer:

If-pen 8 is contact sensing panel 6 no longer, (step 8) can be pointed out this situation at logical zero by signal CS; And

If-its 8 contact sensing panel 6 no longer, (step 8) can be pointed out this situation at logical zero by signal CS; And

-if it is corresponding to obtaining the coordinate that end cycle obtains.

Last condition is checked in step e 10, it is by the number n with reference to the pixel that begins to obtain from person's handwriting, this number n is selected feasible (n-1) and is multiplied by cycle=Tab (being less than or equal to the time that human eye vision persists) between obtaining for twice, in this example, digital n equals 16.

When both of these case did not all satisfy, application processor 22 was waited for and is obtained (b20 of branch) next time.

Therefore, consider the start-up portion of person's handwriting T1, at acquisition time Tab, sensing panel 6 will carry out 16 times serial sampling, send 16 corresponding signal CS continuously at the location coordinate C1 of logical one (Xci, Yc1), C2 (Xc2, Yc2), C3 (Xc3, Yc3) ... (Xc16 is Yc16) to application processor 22 for C16.

The 16th candidate pixel P16 is last of satisfied second kind of condition, and next obtaining of coordinate occurs in outside the time T ab.

After the step of the relevant composition first pixel message, continue the ensuing b0 of branch (Figure 10), so that should accept 16 candidate pixel P1 of a succession of action at this, P2, P3, ... carry out a routine R1 (after this be referred to as pixel and choose routine R1) in the group of P16, the purpose of this routine is when only surpassing a lowest critical value at this this pixel interval on display plane, just to send a series of pixel from the buffering storer.Therefore, carry out choosing memory buffer and send a series of pixel.Therefore, carry out choosing the process of the pixel of memory buffer, to reduce the pixel that this adjacent spaces distance is less than or equal to lowest critical value.A.1.1 be used for the routine R1 of in candidate pixel selected pixels

Explain referring now to the symbol of process flow diagram shown in Figure 10 a and action shown in Figure 11 and to describe pixel selection routine R1.This figure comprises 1 form TXI, and it is based on the state of person's handwriting T1 part outline different parameters in the process of forming the first pixel message MP1 of Fig. 7.

Routine is carried out three index:

-the first index r, the variation of its recording pixel Pr index so that in calculation process as the reference of calculating pixel distance, r be one 1 and n-1 between numeral.(n pixel is last pixel in this group, it can not as the reference pixel of the pixel in the group).

-one second index m writes down selected variation of fetching the number of pixels of transmission in this group; And

-one the 3rd index i writes down the variation of the index of candidate pixel Pi in calculation process.

Be worth r=1 by setting index r to it, and index m to m=1 (step e 12) routine R1 begins.

The initial setting of index r and m reflects that the first pixel P1 of this group is selected the fact of delivering to display screen methodically.

The systematic selection of the first pixel P1 is to represent with the arrow in those row of first pixel of the form TXI of corresponding Figure 11.

Therefore, first is second pixel (pixel P2) in the group through what calculate in group, and the 3rd index is the value of being set to i=2 therefore.

Afterwards, application processor 22 begins to determine that (Xa1, Ya1) (wherein the second pixel P2 in fact is first candidate pixel in the group (step e 14) for Xa2, the Ya2) spacing between with the position A2 of the second pixel P2 for the position A1 of reference pixel P1.

Figure 12 represents this spacing simply, and Figure 12 is a person's handwriting T1 enlarged drawing partly shown in Figure 7, shows S12, S13, S34 and S45 at interval.

Note that Figure 12 a represents point on the person's handwriting T1 with the coordinate of display plane, meaning is that this is that (Xci Yci) converts display surface coordinate Ai (Xai, Yai) result afterwards to the coordinate Ci that will obtain.

Expected having SOME METHODS can determine spacing between two contiguous pixels.

In the described example of Figure 12 a, obtain the actual range that is separating between the pixel on the display plane.In other words, when obtaining two contiguous pixels as input, be called Pr and Pi, has card enlightening youngster coordinate Ar (Xr respectively, Yr) with Ai (Xi, Yi), then the interval in the problem can be tried to achieve by formula Sri={ (Xr-Xi) 2+ (Yr-Yi) 2}1/2, optionally eliminated based on the pixel of the described situation of the process flow diagram of suggestive reason in ensuing accompanying drawing-in a succession of pixel that input end obtains one of this situation-be, thereby the spacing between two pixels that are sent is greater than the critical value Smin of a decision, wherein critical value Smin is that expression is by the size of pixel Pr to the vector of another pixel Pi, shown in Figure 12 a.

Can save the time method of calculating spacing according to another, critical value is not to be decided by the actual range that separates between two pixel Pr and the Pi, but by considering its Building X mark and Building Y target difference Dxri and Dyri (in the situation of cartesian corrdinate) respectively, in this situation, be that Figure 12 b is described, pixel Pi that two are desired to send and the minimum spacing between the Pr must satisfy:

DXri=|Xr-Xi|＞Dxmin or

DYri＝|Yr-Yi|＞Dymin

In other words, in case satisfy one of above-mentioned condition, it is enough just to can be considered the distance of separating between two pixels, thereby these two pixels can be sent.More precisely, two contiguous pixels also might take place significantly separately thereby make second in these two pixels must be sent, but it has only the composition of X or the composition of Y (for example person's handwriting is real is vertical or level on it) in fact, thereby have only and satisfy one of above-mentioned two situations, but still can not eliminate this second pixel Pj.

Figure 12 b is presented at respect to the first pixel P1 location coordinate A1 (Xa1, the critical value Dxmin and the Dymin of measurement decision Ya1), and between pixel the distance of X-axis and Y-axis, these distances are denoted as DXk1 and Dyk1 usually, wherein k and 1 remarked pixel (1,2,3,4,5) index, therefore, if one of two pixels Pk is sent, apart from DXk1, perhaps the group of forming at Y was respectively greater than Dxmin and Dymin apart from Kyk1 between tool between another pixel P1 that sends should have in the direction that X forms.

Therefore, this can be described as us and gets rid of two of transmission contiguous pixels Pk that input end obtained and (being generally second among two) among the P1, if the distance that pixel P1 and one other pixel (being pixel Pk) are separated the direction of the X composition of coordinate system (the normally coordinate system of the pixel display plane that will be sent to) less than Dxmin and in the direction of Y composition less than DYmin.

No matter be the spacing of how calculating between two contiguous pixels, two lowest critical value Smin that send continuously between the pixel, Dxmin or DYmin can be set in n times of the basic spacing between the two adjacent pixels on the display screen, wherein n is an integer, be greater than or equal to 1,2, perhaps 4, perhaps other look the numeral of using decision.Should understand in spacing is when calculating with above-mentioned composition Dxri and Dyri, should give consideration respectively in the spacing of directions X and Y direction, and be when calculating with absolute distance for spacing, should just form a straight line and connect the needed number of pixels of two pixels and consider spacing.

Please note, interval S ri or Dxri and Dyri analyze with coordinate Ai and Aj on the pixel display plane, yet the selection interval S ri of numerical value also can analyze with coordinate Ci and the Cj that coordinate obtains the plane, and perhaps the result can be used for selecting interval S ri or Dxi and Dyi.Other calculating basis also can be suitable for, as long as be linked in the spacing between two pixels on the pixel display plane on can mathematics.

Certainly, these consider to be applicable to too other coordinate system.

In the middle of following description, suppose that the spacing between the contiguous pixels is to calculate with their actual distance of separating.

Yet it is composition X with them that above-mentioned instruction is useful in spacing between the continuous pixel equally, and the situation that Y calculates respectively is as above-mentioned explanation.

Under such situation, the standard that just in ensuing explanation and process flow diagram, replaces calculating of required work with " Dxi＞Dxmin or Dyi＞Dymin ": " Sri＞Smin? " wherein index r represents a reference pixel, and index i represents the candidate pixel that is used for sending.

Therefore, get back to carry out and select routine, whether this spacing S12 deposits the minimum spacing Smin (step e 16) of body greater than being stored in note in application processor 22 decisions.The value of this minimum spacing Smin is to represent with the base unit of display screen coordinate plane, and it is corresponding to the degree of closeness that is allowed between the pixel Pi of a calculating and the reference pixel Pr.If the distance of separating between the pixel Pi of calculating and the reference pixel Pr is below critical value Smin, just this pixel Pi that is considered as calculating does not carry, perhaps carry not enough image information, why can't prove its data of in pixel message, sending.

This minimum spacing Smin (the perhaps value of Dxmin or DYmin) is to be fixed to a capacity and resource service condition, and the function of the standard of use amount.Generally speaking, the mesh on the coordinate grid is thinner, and (perhaps DXmin, the number of unit Dymin) is bigger for mobile Smin.When position sensor uses at noisy environment, advantageously define at least one unit that minimum spacing Smin equals coordinate.

In this example, suppose that application processor 22 criterion S12＞Smin are not satisfied (referring to Figure 12 a).

Therefore begin to carry out the b1 of branch and eliminate candidate pixel P2, pixel P2 too near reference pixel P1, can't be transmitted.

In Figure 12 b, show close example, wherein Xiang Guan standard be " DX12＞Dxmin or DY12＞Dymin? ", candidate pixel P2 not have satisfiedly for these two conditions as can be seen, so candidate's element P2 similarly also can be eliminated.

Next, application processor 22 checks whether the index i of the second candidate pixel P2 equals digital n (step e 20), and when last candidate pixel of the Pn of group had also been calculated, this was checked by the b4 of branch and finishes (part that annular is made fork) to routine R1.

If the result is not, application processor 22 continues this routine after index i is added 1, and it sets its index value i=3 (step e 22) via the b3 of branch, gets back to step e 14.

In this stage, the state of pixel selection routine R1 is shown in the row P2 of the form TXI of Figure 11, please also notice for the pixel that next will calculate, and still be P1 at the reference pixel that is listed as P3.

Application processor 22 calculates the interval S 13 between first pixel P1 and the 3rd pixel P3 in this way, this moment, the 3rd pixel P3 became candidate's pixel (step e 16) in calculation process, in this example, interval S 13 is still less than interval S min (Figure 12), therefore, routine can pass through to step e 18 continuously and eliminate pixel P3, can check that whether the 3rd pixel P3 is last pixel in the group really in step e 20 then, thereby routine moves on to step e 22 and increases index i to i=4.

In this stage, sum up the row P3 of above table, reference pixel remains P1.

Routine P1 continue to get back to step e 14 calculate with the 4th pixel P4 between spacing, the 4th pixel become candidate pixel at this moment, in this situation, (Figure 12 is a) greater than interval S min for interval S 14.

Thus, routine continues the b2 of branch, stores this candidate pixel, it is used as the pixel that is selected transmission is stored to the second memory buffer MT2, wherein the second memory buffer MT2 is stored the pixel of choosing continuously, to form a pixel message (step e 24).

If in the situation shown in Figure 12 b, is the standard of comparison that spacing was suitable between pixel P1 and the P4 DX14＞Dxmin or DY14＞Dymin? from Figure 12 b as can be seen, these two condition DX14＞Dxmin and DY14＞Dymin satisfy, yet, as explained above, as long as candidate pixel one of can satisfy in these conditions and just can keep and send, it then becomes the new reference pixel Pr of ensuing candidate pixel.

Afterwards, routine R1 carries out step e 26 and upgrades the r value, makes its i value corresponding to reality (equaling 4 here) so that the 4th pixel P4 is updated to reference pixel Pr.After this, in step e 28, index m adds 1 and is selected the instant number (equaling 2 at present) of the pixel of sending with calculating, and routine whether carry out step e 20 at last be in the group last in order to differentiate processed pixel.If the result is not, then routine R1 continues the b3 of branch, and index i is added 1 (step e 22).

In this stage of routine R1, be summarised in the row P4 among the above table TXI, can find that two pixels are selected to pixel message (reference pixel of those row is P1, as the reference image number of pixel P4).

Routine R1 then carries out the calculating (in step e 22, i has been increased to 5) of candidate pixel P5, and by above-mentioned step e 14 and E16.End in step e 16, determine spacing between reference pixel Pr and candidate pixel P5 greater than Smin, therefore, routine R1 continues the step of the b2 of branch, by step e 24, E26, and E28, allow this 5th pixel to be stored the pixel that is selected as, and above-mentioned step is set index r, i and m, the row P5 of Figure 11 form TXI promptly summarizes the state of routine R1 in that stage.

Routine continues to handle ensuing candidate pixel P6 or the like, the candidate pixel that its suitable renewal is calculated, the candidate pixel that reference pixel Pr and storage are selected is to form pixel message MP1, in case all candidate pixels are all calculated, the branch B4 of routine R1 after step e 20 finishes.

In this example, 11 following candidate pixels are chosen at according to the standard of setting forms pixel message when routine finishes, and they are respectively P1, P4, and P5, P6, P8, P11, P12, P13, P15 and P16, other candidate pixel then is removed.

Should understand and select the pixel that will send and similarly can use standard DXri＞Dxmin or DYri＞Dymin according to the described situation of Figure 12 B? " and obtain, so the same result that has of two kinds of different situations is the selection of depending on the Smin value on the one hand, then is the value of Dxmin and Dymin on the other hand.Notice also that please Dxmin can equate with the value of Dymin, perhaps different, for instance, consider the difference of differentiating X-axis and Y-axis on the coordinate plane.

The order that these pixels that are selected are just selected together with them when they are selected is stored to the second memory buffer MT2 (Figure 11) of application processor 22 management, because these pixels are to form first pixel message MP1, meaning promptly, the pixel message of the pixel that its first pixel transmits before not being linked to by straight-line segment, the contact indication CS1 of pixel P1 can become logical one by logical zero, and this pixel message should comprise the pixel that all are stored in memory buffer MT2.At the order of its a succession of pixel of pixel message that so forms and the transmission order that is selected pixel is to originate in pixel P1, finishes at pixel P16.The number of pixels ml that chooses out from this group is 11, and this numeral should be included in the beginning part of this message, is expressed as two-symbol form (Fig. 6) at the bit D0 to D3 of first byte.

In other embodiment, by the content of the first memory buffer MT1 that recombinates, it is possible implementing the pixel selection routine and not using the second memory buffer MT2.Figure 10 b promptly shows the embodiment that these are different, as previous embodiment, and three index e, m, i just is configured to r=1 in step e 12 ' when routine R1 begins, i=2, m=1.Similarly, in step e 14 ' and E16 ', minimum spacing between reference pixel Pr and the candidate pixel pi is similarly effective, if the actual range that the candidate pixel Pi that calculates is reference pixel Pr to be separated is less than Smin, whether routine R1 continues the b1 ' of branch is last pixel of storer MT1 (step e 20 ') to differentiate this pixel Pi, if the result is for being that then routine R1 is by the b1 of branch " end; memory buffer MT1 should comprise the pixel that is retained, and the number of pixel is represented with index m.If pixel Pi is not last pixel of storer MT1, the process of then eliminating this candidate pixel Pi (because its too be not selected near reference pixel) comprises that all grades in the mobile memory MT1 go to fill because the blank column (step e 18 ') that this pixel of elimination Pi stays greater than storage area of pixel of i.A pixel Pi+1 that rearranges has like this replaced pixel Pi, and next pixel Pi+1 becomes the new pixel Pi that will calculate.(Figure 10 a) compares with before embodiment to answer Zhang meaning here, the pixel that storage is selected is unnecessary, unless all pixels all will be retained in storer MT1 pixel and be eliminated, the number of pixels n that is comprised at storer MT1 deducts 1 to represent that the candidate pixel that is not retained is eliminated then.Afterwards, routine R1 continues to calculate new pixel Pi in step e 14 ' and E16 '.

As interval S ri during greater than Smin, routine R1 carries out the b2 ' of branch to keep this candidate pixel, the reference pixel that next this candidate pixel becomes (step e 26 '), afterwards, it is last that the number of pixels m that is selected adds 1 (step e 28 '), differentiates whether the pixel Pi that keeps is last pixel of storer MT1, and routine R1 continues the b3 of branch, and computation index i adds 1 (step e 22 '), carries out the calculating of new candidate pixel Pi again again in step e 14 ' and E16 ' then.

Last candidate pixel Pi is through the processing of step e 14 ' and E16 ' and b2 ' or b1 ' in storer MT1, and routine R1 finishes and the and then b4 of branch.Mileage word m represents to form the number of pixels that pixel message MP1 is kept in this stage.

In this embodiment, last at handling procedure, the configuration of content is identical with the configuration of the second memory buffer MT2 shown in Figure 11 among the storer MT1, next pixel message MP1 just sends from storer MT1 as last embodiment.A.1.2 the transmission of the first pixel message MP1

In case form the first pixel message MP1, following step just considers to send this message, this initial step that sends information will be accompanied by Figure 13 now and describe.

After routine R1 formed pixel message, application processor 22 was differentiated pixel message MP1 and whether is formed the first pixel message of sending, and anticipates promptly, and whether it begins formed pixel (step e 32) corresponding to person's handwriting.Based on such purpose, an indication that is expressed as PMP is used, the pixel message that the indication of its logical states will send be corresponding to the Pixel Information with previous transmission connect each other a series of, or initial corresponding to person's handwriting.According to the custom of using in the past at this example, be to represent not represent that the pixel message of the person's handwriting that produces is being sent before when this is designated as logical zero, logical one represents that then the pixel message of the person's handwriting that at least one expression produces is sent.When resetting application processor 22, indication is set to logical zero, does not up to the present have pixel message to be sent with expression.

Whether this step e 32 ' comprises judges message along with previous message is sent, and anticipates promptly, and first pixel of this present pixel message is linked to last pixel of previous message.

Person's handwriting T1 part shown in Figure 7 produces pixel message MP1 based on examining the beginning of forming a person's handwriting, therefore, does not have pixel message before it.

Therefore, action after the b5 of branch and application processor 22 make the binding indication invalid (step e 34) of this message, and this action comprises that the bit BL of the position D7 of the 3rd byte setting this pixel message is logical zero (with reference to figure 6).

Afterwards, application processor 22 is sent pixel message MP1 to communication processor 24, make communication processor 24 pixel message MP1 can be delivered to the one or more message sink means that transmit fax writing station 2a outside via communication network 4, for example, receiving trap (step e 36).For transmitting the pixel message (referring to pixel message MP1 here) that pixel is not linked to previous pixel message, the individual pixel of mk1 in this pixel message (equaling 11) all is sent.

Afterwards, it is logical one that application processor 22 is set indication PMP, and the pixel message of the person's handwriting that forms with expression is sent (step 38).

Next, pixel message MP1 is sent to the demonstration means that are integrated into the sensing face 6 that forms present person's handwriting, the result, form a line on the screen of demonstration means, this line is to link M1 the pixel of choosing that forms the first pixel message MP1 to form (step e 40), this action comprises the continuous pixel P1 that uses in the above-mentioned technology binding pixel message, and P3, P4...... form a straight line.The result forms a continuous person's handwriting by the first pixel P1 to last pixel P16 that is selected, these person's handwriting reflection pen 8 person's handwriting T1 parts that produced.

It should be noted that pixel note breath is a screen (step e 36) of preferentially delivering to far-end, the binding of the known screen of far-end in this example and these screens is by telephone network, and this is the slowest.This selection can be shortened significantly and appears on the screen and same pixel appears at time between the sensing panel 6 in the pixel that forms this person's handwriting.

Because pixel message MP1 is first pixel message of a continuous person's handwriting, its signal CS is set at logical one, application processor 22 is placed on the leading position of memory buffer M1 and M2 to this last pixel (referring to pixel P16 here) of pixel message M, and this pixel becomes the reference pixel (step e 42) of later pixel.

After first pixel message is sent, continue to handle the pixel of the second pixel message.A.2 the continuity of person's handwriting: a pixel message links the structure of previous pixel message.

It obtains pixel message after the first pixel message candidate pixel and has spent the acquisition time Tab same with the first pixel message.Yet, the time T ab of follow-up message must comprise obtain pixel message at last last candidate pixel to the time between first candidate pixel that obtains the second pixel message.Therefore, the candidate pixel number of the second pixel message lacks 1 compared with the candidate pixel number of the first pixel message, and meaning promptly equals 15 here.Should understand, still with when sensing panel 6 contacts, this situation is applicable to all pixel message afterwards at pen.

Obtaining 15 coordinate C17 to C31 is that the flow process of the two is identical, and obtains frequency without any change immediately following after obtaining the first pixel message before with 15 candidate pixels that obtain next pixel message.Therefore obtaining coordinate C17 to C31 carries out simultaneously with the step of forming the first pixel message MP1.

Suppose to obtain after the pixel message MP1 of corresponding person's handwriting, pen 8 still contact a period of time and equals reed fetch cycle Tab at least with sensing panel 6, continue with other coordinates that obtain continuously calculating person's handwritings.At this, obtain the second pixel message to I haven't seen you for ages in continuous obtaining among the period T ab.A.2.1 present pixel message is got by the continuous coordinate reed in acquisition time.

Have now the structure of pixel message in this particular case will be described with pixel message M2.

The pixel that the second pixel message comprises in a plurality of pixels and the first pixel message forms a continuous person's handwriting.

As the above, last pixel of pixel message MP1 is placed in the leading position amount of memory buffer M1 (being placed on memory buffer M2 similarly), forms the reference pixel of the candidate pixel of the second pixel message.

The step of forming the second pixel message be 16 coordinates that obtain be performed obtain the first pixel message MP1 after, the sensor by sensing panel 6 obtain location coordinate Ci (Xci, Yci).

Therefore, this step is applied mechanically again and is selected routine R1 (Fig. 8), by receiving coordinate (step e 2), converts coordinate to pixel (step e 4), store these pixels (step e 6), and the step of detecting pen (step e 8) begins.

Obtaining among the period T ab of setting, can obtain 15 new coordinates obtains, these 15 are obtained and produce 15 candidate pixel data P17 to P31 and be stored in memory buffer MT1, and wherein memory buffer MT1 has comprised last pixel P16 that chooses of previous pixel message MP1.Note that in previous embodiment when obtaining these 15 new coordinates, an activation signal SC is continuously logical one, this state is in step e 8 detected (Fig. 8).

After reed fetch cycle Tab of the second pixel message MP2 went over, 15 pixels were acquired, and the step of this pixel message continues routine R1, selected the pixel that will send in the group of candidate pixel P17 to P31.The mode of carrying out of this selection is identical with the mode that obtains the first pixel message, and the standard of selection too.Therefore, compare routine based on succinctly just no longer repeating.

Next form by the pixel of selecting among the candidate pixel P17 to P31 with the corresponding second pixel message of 15 coordinate C17 to C31 that obtain.Wherein first candidate pixel that is selected is to be decided by the pixel P16 from last pixel message.

In the end of a period (Figure 13) of routine R1, application processor 22 checks whether the second pixel message is continuous previous pixel message (Figure 13 step e 32) by relatively indicating PMP, if the result who checks is for being then next to carry out the b6 of branch.First step of the B6 of branch is to judge whether the number of pixels M2 that is kept at the second memory buffer MT2 equals 1 (step e 44).In this example, number of pixels M2 is not equal to 1, then application processor 22 continues the step of the b7 of branch, sets to link indication bit to logical one, is linked to last pixel (step e 46) of the previous message MP1 that receives with the pixel of pointing out the second pixel message MP2.

Because M2 pixel is stored in memory buffer MT2, processor forms a pixel message MP2 should only comprise last M2-1 pixel in the storer.Clearer says, as explained above, first pixel of memory buffer M round-robin (is the part of the pixel of the first pixel message MP1 that sends before being of pixel P160, therefore, there is no need to send same pixel again.

In other words, the second pixel message should comprise all and obtain the candidate pixel that produces in the period T ab at second, and the number m2 of these pixels equals M2-1.

The beginning of this pixel message MP2 part if according to Fig. 6 described agreement be placed on message M wide in the field of candidate pixel (being second pixel of memory buffer MT2) of first reservation.

The pixel message MP2 that next application processor 22 will have last M2-1 pixel among the storer MT2 sends Communication processor 24 to.Please note, if application processor 22 judges that in step e 44 the number of pixels M2 that is included in storer MT2 has just promptly equaled 1 (b8 of branch), then its pixel must be to be stored in methodically in the storer corresponding to last pixel chosen in the previous pixel message, does not therefore have pixel to be selected in 15 new coordinates obtain.The generation of this situation is only at sensing panel 6 during still in activity, determined as step e 8, and the spacing between 16 pixels that move that it obtains at last of representing pen 8 this moment and the position of reference pixel is also above minimum spacing Smin.This reference pixel is sent out in previous pixel message (being last pixel of choosing), does not need it to be sent out in this situation again, and step continues above-mentioned step e 2 and handles a new pixel message.

After step e 46, Communication processor 24 takes turns to this pixel message of transmission MP2 and is sent to one or more demonstration means via telephone wire 4.

Afterwards, application processor 22 is sent the screen of pixel message MP2 to corresponding sensing screen 6, make it possible to show and link this M2-1 the pixel of choosing on the one hand, on the other hand first pixel in M2-1 the pixel is linked to the line of last pixel P16 of previous pixel message, so that show the lines (step e 40) of M2 pixel.

At last, application processor is placed on the front end of storer MT1 and MT2 with last pixel of choosing of pixel message MP2, and this pixel is designated as first reference pixel of forming one the 3rd pixel message MP3.

By this way, detected still all moment of contact sensing panel 6 (step e 8) at pen 8.Each pixel message should be the selected pixels formation with different numbers, and the connection of first pixel indication BL is configured to logical one.

As shown in figure 14, person's handwriting T1 follows continuous four continuous and continual person's handwriting part T2 to T5 in this example, and each is to be formed by step e 2 to the pixel message that E48 obtained respectively.

This person's handwriting finishes with last pixel of choosing of last person's handwriting part T5, constitutes the interruption of this person's handwriting.The pixel message MP5 that how to obtain corresponding this interruption person's handwriting will be described now.A.2.2. coordinate obtains when interrupting during obtaining period T ab.

The end of supposing person's handwriting here is to leave sensing panel 6 because of pen 8 before finishing at the pixel period Tab that obtains pixel message to cause, but has still obtained the coordinate of some.Below the person's handwriting T5 of Figure 14 is described such state.

In following step is with described step is identical before, and uses initial employed sign in close description.

The obtaining of the coordinate of person's handwriting T5 part (step e 2), the storage (step e 6) of the conversion from the coordinate to the pixel (step e 4) and these pixels is carried out as the person's handwriting of front, is employed processor up to the interruption of person's handwriting in step e 8 and detects.This interruption makes step along the b9 of branch, and its step is a process flow diagram as shown in figure 15.

Next application processor 22 is detected and whether is only obtained a coordinate in the acquisition time Tab that interrupts (Xci Yci) is acquired, and (step e 50) in this example, supposes the situation that is not such to Ci.

Next this step is carried out the b10 of branch with routine R1 and is selected and store the pixel (Figure 16) that will send corresponding this interruption person's handwriting T5 part, end of a period at routine R1, application processor 22 produces one the 5th pixel message MP5, has comprised m5 the pixel of choosing after it begins part.

Afterwards, application processor 22 is differentiated the pixel message that the 5th pixel message is sent before whether continuing, and please refer to the described step e 32 of Figure 13 (E32 ').If differentiate the result be, following step is along the b11 of branch, as aforesaid step e 44, application processor 22 differentiate keep number of pixels whether equal 1 (step e 44 ').If the judged result of step e 44 ' is for denying, then next step is set pixel binding indication (step e 46 ') and is sent in M5-1 stored last pixel (step is willing and yet unable to help 48 ') of second memory M circulation along the b12 of branch, this M5-1 last pixel groups becomes m5 pixel in the pixel message, its on certain program similar in appearance to above-mentioned step e 46 and E48.

Interrupt before last because this pixel message is person's handwriting, it is logical zero that celebrating is set indication PMP with processor 22, must be regarded as first pixel message (step e 52) to explain ensuing pixel message MP6.

Afterwards, as in embodiment before, application processor 22 orders show the lines (step e 40) of these pixels on the screen of sensing panel 6.

Yet, described its pixel of pixel message must be linked to last pixel of previous pixel message before being different from, under present described this situation, application processor 22 needn't keep its memory buffer MT1 and first space of M round-robin (step e 54) for last pixel of choosing of pixel message MP5.In other words, new pixel message MP6 is first element as same new person's handwriting, as person's handwriting T1, therefore not with reference to previous pixel.

Equal 1 if detect the number of pixels of reservation in step e 44, then once explained as the front, single pixel can not be sent, following step then indicates PMP to logical zero (step e 52 ') along the b13 of branch to set, and begins the leading position (step e 54) of buffer release storer MT1 and MT2 then.

Like this, in order to constitute and to send pixel message, take the step (step e 2 to E42) identical with the first pixel message MP1 corresponding to the part T6 (Figure 14) of new person's handwriting.

In this example, the linking portion (Figure 14) that step mark T6 partly follows person's handwriting T7, for the pixel message MP7 partly corresponding with person's handwriting T7, the step of processing is as pixel message MP2.

Can recognize composition as described herein and the process that sends pixel message thus, can manage continuous person's handwriting and the person's handwriting that comprises interruption, as long as comprise pixel obtaining pixel message that period T ab produced more than 1.A.3 the formation that only comprises the pixel message of a pixel.

To describe now and handle the pixel message that only comprises a pixel, a such pixel message can be connected to previous pixel message, or separates with previous pixel message.A.3.1 when this single pixel is connected to last pixel message.

This situation can be the person's handwriting Tf part that occurs in the end of a period of a continuous person's handwriting, last last pixel once obtained corresponding to person's handwriting Tf of this expression.Based on this fact, pixel is stored in the second place of memory buffer MT1, and the primary importance of memory buffer MT1 is occupied by last pixel of pixel message MPf-1 (being the reference pixel of pixel message MPf).

Finish above-mentioned step e 2 to E8 (Fig. 8) in the program of this situation.End of a period in step e 8, detect no longer contact sensing panel 6 of pen 8, whether then application processor 22 carries out the b9 of branch to differentiate in the acquisition time Tab that has interrupted, have only a candidate pixel to be stored in storer MT1 (except last selected pixels of the previous pixel message that is placed in storer at the very start) (step e 50 of Figure 15).

Suppose discrimination result for being, then application processor 22 continues to differentiate last pixel whether this unique pixel is linked to previous pixel message along the step of the b14 of branch, as aforesaid step e 32 or E32 ' (step e 56).If this pixel is last pixel of a continuous person's handwriting, this pixel must be connected to last pixel of previous pixel message.Based on such purpose, to logical one (step e 58), and the order Communication processor is sent this in the selected unique pixel (step e 60) of coming out of Tab break period to application processor 22 along the b15 of branch and the binding indicative of settings of pixel message that will comprise this single pixel.

Then, it is logical zero that application processor 22 is set indication PMP, represents that ensuing pixel message can be first pixel message, handles follow-up pixel message and must be considered as the new person's handwriting (step e 52) that it comes the arbitrary position on the comfortable sensing face plate 6 to begin.

In case this pixel is sent in order, application processor 22 is just ordered at sensing panel 6 and is shown that last pixel sent with previous pixel message is linked to the lines of unique pixel of this pixel message at present.

Then, processor 22 discharges first space of storer MT1 and MT2 and gives next pixel message (step e 54 '), and as aforesaid step e 54, this space generally is last pixel of leaving previous pixel message for.A.3.2 when this unique pixel is not linked to previous pixel message.

This situation promptly is pen 8 so-called " contact is just left " action for sensing panel 6, and meaning promptly when pen 8 just taps the sensing panel, does not have other significantly to move.The action that a contact is so just left is common at the sensing screen, for example selects to be presented on the panel with image format button, the instruction of catalogue performance.

To describe the action that pen 8 contact is just left now, this action causes a single pixel to be labeled.

As the example of front, application processor 22 along the step e 2 of Fig. 8 to E8.When (step e 8) interrupted in the contact of pen 8, whether processor 22 carries out the b9 of branch differentiation and has only a pixel to be stored (Figure 15 in step e 6, step e 20), if the result who judges is, whether the pixel of then further judging this storage is equivalent to be linked to the pixel (step e 56) of last pixel of previous pixel message.Because this is to indicate (srceen-designation) pixel at the screen that processing one separates, and does not therefore set up binding with previous pixel.Processor is next along the b16 of branch, and is that logical zero makes the binding indication of this message invalid by setting bit BL.Then, processor 22 order Communication processors are sent pixel to the receiving trap that connects telephone wire (step e 66).

Then, application processor 22 carries out showing the step (step e 68) of this pixel on the screen of sensing panel 6, and next pixel message (step e 54 ') is given in first space that discharges storer MT1 and MT2, and this space generally is last pixel of leaving previous pixel message for.A.4 with the formation of lacking the corresponding pixel message of person's handwriting.

In fact, might in the very short time that pen 8 leaves to it with the contact of sensing panel, produce significantly person's handwriting, why can produce this person's handwriting can be owing to for example consider to be chosen in the instruction of showing with pixel on the screen apace with short contiguous pixels, perhaps marking a square on screen, also might be owing to skip over gently on sensing panel 6 with pen 8 and to form the action that aforesaid contact just leaves and caused.

In this case, processor carries out step e 2 to E8 and left sensing panel 6 (step e 8) before pen 8 is obtaining end cycle, proceeds the step of the b9 of branch then, yet, with respect to the example of front, conversion is obtained the number of pixels that step produced of coordinate greater than 1 in step e 4.

Therefore, application processor 22 judges that in step e 50 number of pixels that stores is not equal to 1, therefore continues the b10 of branch, to carry out first pixel selection routine R1 (Figure 16).

End of a period at routine R1, the pixel that application processor 22 is judged storage in step e 32 ' does not link last pixel of previous pixel message, because this person's handwriting is brief (duration that meaning being it less than Tab) and be separated, indication PMP is a logical zero.Processor carries out the binding indication bit BL invalid (step e 70) that the b7 of branch makes this pixel message that comprises the pixel that is selected then, and the order Communication processor is sent the receiving trap that all selecteed pixels connect to telephone wire.

Then, the pixel that is selected of processor command is presented on the screen of sensing panel (step e 40 ') and as release first memory explained earlier space (step e 54).B. the reception of a pixel message

These actions will be described with reference to Figure 17 and Figure 18.

When receiving a message, the character that receiving trap (after this being often referred to receiving terminal) is analyzed pixel is command messages or pixel message or the like (Figure 17 step e 80), and a pixel message is that the bit D4 to D7 with its first byte sets binary bit word 0001 for and defines.

The signal of supposing present receiver side in fact is a pixel message, indicates MPk.

Then, receiving end reads in the number mk (step e 82) of the pixel that comprises in this message at the D0-D3 bit of first byte of pixel message MPk (Fig. 6).

Then, the receiving end basis judges at the logical states of the binding indication bit BL of the position of the 3rd byte D7 whether first pixel of pixel message MPk is linked to last pixel of pixel message MPk-1.B.1 first pixel is not connected to the demonstration of pixel message of last bar element of previous message.

When a pixel message MPk is not connected to previous pixel message MPk-1, it be a person's handwriting first pixel message (as with pixel message MP1 with respect to person's handwriting fractional t1 shown in Figure 7), then the receiving end step of carrying out the B20 of branch is with the pixel that the stores pixel message MPk start-up portion (step e 86) at the memory area of a pixel input store MR.

Next receiving end judges whether only to receive a pixel (step e 88), should suppose that this message comprises several pixels, especially pixel message MP1.

Next receiving end continues the step of the b21 of branch, and execution links together the routine (step e 90) of the person's handwriting part of demonstration respective pixel message MPk by a succession of pixel with pixel message MPk.This action is as above to add a straight-line segment with each space between two contiguous pixels describedly.

Received last pixel is maintained at the primary importance (step e 92) in the above-mentioned memory area among the pixel message MPk, or rather, if link with ensuing message MPk+1, the data that last message comprised of pixel message MPk are necessary for the binding of first pixel of foundation and pixel message MPk+1.

In case these actions are finished, terminal is just waited for new message.

Please note that if pixel message MPk includes only the pixel (as what judged in step e 88) of a reception this single pixel is presented on the coordinate points corresponding on the display screen (b22 of branch, step e 94), does not pass through above-mentioned step e 90 and E92.B.2 first pixel is linked to the demonstration of pixel message of last bar element of previous message.

Consider now that its first pixel of message of receiving is last pixel that is linked to previous pixel message, as the example at the second pixel message MP2 of Fig. 7, this pixel message is denoted as MPk+1 usually.

Receiving end carries out step e 80 to E84 (Figure 17) as the above, and in step e 84, receiving end is followed the step of the b23 of branch, and this part is described referring now to Figure 18.

Next receiving end arranges to originate in the pixel (step e 96) of pixel message MPk+1 of the second place in the memory zone of pixel input store MR.This is because in fact first pixel of this message is linked to last pixel of previous message MPk-1, and the primary importance of memory area is by last pixel of this previous message account for (referring to Figure 17 step e 92).

Then, receiving end judges whether the message that receives only comprises a pixel (step e 98), suppose not to be such situation now, then receiving end along the b24 of branch, its first step is to show the lines (step e 90 ') that link the pixel that is stored in memory area.Receiving end is placed on the regional starting position (step e 92 ') of this memory with the pixel of last reception then, as aforesaid step e 90 and E92.

If ensuing pixel message MPk+1 only comprises a pixel, then last pixel (in first position) of the memory area previous message that can only comprise and single the pixel (second position) of pixel message MPk+1.Receiving end can show the straight line (step e 100) that links these two pixels along the b25 of branch then, and single the pixel that is selected of pixel message MPk+1 is placed on the reference position (step e 102) of memory area.

Should be appreciated that the present invention also is applicable to the embodiment that other are different, and can be applied in the other field except that fax writes, for example:

-pixel data of screen associated is delivered in management from the coordinate deriving means in interactive screen.

-transmitted image on a certain link, image can be broken down into a succession of continuous formed person's handwriting of pixel: the selection of the pixel of desiring to send can be set up according to the present invention.

-directly not being presented at the person's handwriting input system of obtaining the surface at a person's handwriting, the situation of draught machine for example: the selection of desiring to deliver to distal displayed or being stored to the pixel of a person's handwriting storer can be set up according to the present invention.

In this example, obtain period T ab and get at interval, therefore allow to obtain 16 pixels or 15 candidate pixels of following continuously form a specific pixel message corresponding to 15 coordinate reeds.This high relatively number is based on two coordinates short result of (1ms) at interval that obtains between obtaining.

In many application, also can between obtaining, use two coordinates long interval, 5ms for example, like this, each obtains in the period T ab, and candidate's number of pixels will be reduced to 3.How the personage who has the knack of this skill makes that the above embodiments are suitable celebrates in these different parameters if should understanding easily.

Industrial applicibility: the present invention has industrial application, for example shows and transmission terminal in pixel.

Claims (50)

1. an expression person's handwriting that obtains from input end changes the method for transmission pixel a series of pixel (P) of (T1-T5), it is characterized in that, sending pixel (P) before, this a series of pixel is optionally eliminated, and makes minimum interval (Sri between two pixels of sending continuously (Pr and Pi); Dxri is Dyri) greater than a predetermined critical value (Smin; DXmin, DYmin).

2. the method for claim 1, wherein the setting of the position of pixel (P) is the numerical value according to its relating to parameters corresponding with coordinate system, if difference between two contiguous pixels (Pr and Pi) numerically makes one of described parameter greater than the critical value (Smin that sets; Dxmin, Dymin), this minimum interval (Sri then; DXri Dyri) is exceeded.

3. method as claimed in claim 2, wherein this parameter is the X of a coordinate system, the Building Y mark, if:

DXri=|Xar-Xai|＞Dxmin or

Dyri＝|Yar-Yai|＞Dymin

(DxriDYri) is exceeded in this minimum interval;

Wherein Xar and Xai are respectively the Building X scale value of two contiguous pixels (Pr and Pi), and Yar and Yai are respectively the Building Y scale value of two contiguous pixels, and Dxmin and Dymin are respectively for the critical value of Building X mark with Building Y mark decision.

4. as claim 1,2 or 3 described methods, wherein be somebody's turn to do default critical value (Smin; DXmin, Dymin) greater than doubly at the n of the basic spacing between the two adjacent pixels on the display plane, wherein n be one more than or equal to 1 integer.

5. method as claimed in claim 4, wherein this n value is more than or equal to 2.

6. method as claimed in claim 4, wherein this n value is more than or equal to 4.

7. as the described method of one of claim 1-6, wherein pixel (Pi) is to be sent in the packet that comprises a pixel at least, obtains that the time interval between first pixel and last pixel is less than or equal to a default time critical values (Tab) in this packet.

8. method as claimed in claim 7, wherein this time critical values (Tab) is less than the persistence of vision of human eye.

9. as claim 7 or 8 described methods, wherein this time critical values (Tab) is less than 30ms.

10. method as claimed in claim 8, wherein this time critical values (Tab) is less than 20ms.

11. method as claimed in claim 8, wherein the pixel of each packet (MPK) is corresponding to the pixel that forms a continual person's handwriting part.

12. as the described method of one of claim 7-11, wherein the pixel of each packet is formatted into a pixel message (MPK), this pixel message can be sent and take out data when receiving by self-discipline ground.

13. method as claimed in claim 12, wherein this pixel message (MPK) comprises an identification field (60), indicates this message to comprise pixel data.

14. as claim 12 and 13 described methods, wherein this pixel message comprises a number field (62), and the number of pixels that is included in this message is described.

15. as claim 13 or 14 described methods, this identification field (60) wherein forms the beginning part (58) of this pixel message (MPk) with this number field (62).

16. as the described method of one of claim 12-15, wherein this pixel message comprises data (BL), points out whether first pixel of this pixel message is linked to last pixel of previous pixel message (MPk-1).

17. as the described method of one of claim 1-16, wherein each pixel of sending comprises that one first field (52) points out whether this pixel is connected to the previous pixel of sending, one second field (54) is illustrated in first coordinate (Xai) of a display plane, and one the 3rd field (56) is illustrated in second coordinate (Yai) on the coordinate plane.

18. method as claimed in claim 17, wherein this first field is integrated into one in order at least one bit in the byte of representing this first coordinate or second coordinate.

19. as the described method of one of claim 1-18, wherein be arranged in the group of the pixel that default acquisition time (Tab) lining receives continuously in the pixel that an input end is obtained, if and owing in first group of pixel of a known person's handwriting, comprise first pixel of the start-up portion of a person's handwriting, then:

A) this first pixel is set at a reference pixel (Pr) by the starting point, and other pixels (Pi) in the group are set to the candidate pixel of sending being selected:

B) for each continuous candidate pixel in the group, whether the spacing between decision reference pixel and the candidate's picture is greater than default critical value (Smin; Dxmin, Dymin);

C) if this spacing less than this critical distance, then this candidate pixel is eliminated;

D) if this spacing is not less than this critical value, this candidate pixel is selected transmission, and this pixel that is selected is set the new reference pixel as step b; And

E) this first pixel is sent with the described candidate pixel of choosing.

20. as the described method of one of claim 1-19, wherein the pixel of being obtained at an input end is managed by the group of the pixel that receives continuously according to default acquisition time (Tab) lining, if and one group of pixel is immediately following after last group pixel, in person's handwriting, do not have discontinuous, then:

A. the pixel of sending at last of this last group of pixel is set at a reference pixel (Pr) by the starting point, and the pixel of follow-up group then is configured to be selected the candidate pixel of sending;

B. for each continuous candidate pixel (Pi) of present group, judge whether the spacing between reference pixel and candidate pixel faces range line from (Smin greater than default; DXmin, DYmin);

C. if this spacing less than this critical distance, then this candidate pixel is eliminated;

D. if this spacing is not less than this critical value, this candidate pixel is selected transmission, and this pixel that is selected is set the new reference pixel as step b; And

E. comprise that a series of of candidate pixel that are selected in this group are sent, it is instructed to first pixel of this series is linked to last pixel of last group of pixel.

21. as the described method of one of claim 1-20, wherein be arranged in the group of the pixel that default acquisition time (Tab) lining receives continuously in the pixel that an input end is obtained, if and in continuous pixel appearance interruption, in the end only obtain under the situation of a pixel in an interrupted acquisition time, then this has only a pixel to be sent methodically.

22. as the described method of one of claim 1-21, it is characterized in that this person's handwriting is to produce in an interactive screen (6), interactive screen comprises a display screen and a coordinate deriving means that is integrated into this display screen, the pixel of obtaining in an input is to obtain from the position data that this coordinate deriving means is provided, and the pixel of this transmission is to be received by this display screen.

23. as the described method of one of claim 1-22, wherein this pixel of sending is sent at least one receiving end (2), source (6) a good distance off of this receiving end and the pixel of obtaining in input.

24. method as claimed in claim 23, wherein this pixel of delivering at least one receiving end is transmitted on serial link, for example telephone wire.

25., wherein be the fax writing station that is used to connect at least two communications as the described method of one of claim 1-24.

26. as the described method of one of claim 7-25, wherein at least onely comprise that the message of other data is inserted between the two pixel data bags except that pixel, last pixel of a packet is planned continuously first pixel to another packet to represent a continuous person's handwriting.

27. the method for the pixel that a reception optionally transmits according to the described method of one of claim 1-26 comprises the following steps:

A. receive the pixel that each is sent;

B. if the pixel of a series of reception, decision must link together to form the pixel of a continuous person's handwriting; And

C. for each pixel that will be bonded, produce a straight-line segment and link this pixel, so that wanting to form a continuous person's handwriting between connected this pixel extremely in this a series of previous pixel.

28. send the device of pixel a succession of pixel of the variation (T1-T5) of an expression person's handwriting that obtains from input end, it is characterized in that it comprises

The device (22) of the space interval of judgement between contiguous pixels and this a succession of pixel; And

Optionally eliminate the device (22) of this a succession of pixel, make minimum interval (Sri between two contiguous pixels of sending; Dxri is DYri) greater than a critical value (Smin who sets; Dxmin, DYmin).

29. method as claimed in claim 28, wherein more comprise device according to the setting value location of pixels of the parameter correlation of a coordinate system, if for the critical value (Dxmin of the spacing between one of them parameter two contiguous pixels (Pr and Pi) greater than its corresponding preset, DYmin), then this minimum interval is exceeded.

30 devices as claim 29, wherein this parameter is the X of a coordinate system, the Building Y mark, if:

DXri=|Xar-Xai|＞Dxmin or

Dyri＝|Yar-Yai|＞Dymin

(DxriDYri) is exceeded in this minimum interval;

Wherein Xar and Xai are respectively the Building X scale value of two contiguous pixels (Pr and Pi), and Yar and Yai are respectively the Building Y scale value of two contiguous pixels, and Dxmin and Dymin are respectively for the critical value of Building X mark with Building Y mark decision.

31., wherein be somebody's turn to do default critical value (Smin as the described device of one of claim 28-30; Dxmin, DYmin) greater than doubly at the n of the basic spacing between the two adjacent pixels on the display plane, wherein n be one more than or equal to 1 integer.

32. as the described device of one of claim 28-31, comprise more that wherein transmission comprises the pixel of the packet of a pixel (MPk) at least, obtain that the time interval between first pixel (P1) and last pixel (Pmk) is less than or equal to a default time critical values (Tab) in this packet.

33. device as claimed in claim 32, wherein this time critical values (Tab) is less than the persistence of vision of human eye.

34. as claim 32 or 33 described devices, wherein the pixel of each packet (MPk) is corresponding to the pixel that forms a continual person's handwriting part.

35. as the described device of one of claim 32-34, wherein more comprise the device that the data packet format of each pixel is changed into a pixel message (MPk), this pixel message can be sent and take out data when receiving by self-discipline ground.

36. device as claimed in claim 35, wherein this pixel message (MPk) comprises an identification field (60), indicates this message to comprise pixel data.

37. as claim 35 or 36 described devices, wherein this pixel message (MPk) comprises a number field (62), and the number of pixels (mk) that is included in this message is described.

38. as claim 36 or 37 described devices, wherein this identification field (60) and this number field (62) form the beginning part (58) of this pixel message (MPk).

39. as the described device of one of claim 35-38, wherein each pixel message (MPk) comprises that data (BL) point out whether first pixel of this pixel message is linked to last pixel (MPk-1) of previous pixel message.

40. as the described device of one of claim 28-39, wherein more comprise a formatting mechanism, each pixel format of sending is changed into comprise: one first field (52), point out whether this pixel is connected to the previous pixel of sending; One second field (54) is illustrated in first coordinate (Xai) of a display plane; And one the 3rd field (56), be illustrated in second coordinate (Yai) on the display plane.

41. device as claimed in claim 40, wherein this first field (52) is integrated into one in order at least one bit in the byte of representing this first coordinate or second coordinate.

42. as the described method of one of claim 28-41, the device that wherein more comprises the pixel of being obtained in input according to the management and group of the pixel that receives continuously in the default acquisition time, and comprise first pixel (P1) of the start-up portion (T1) of a person's handwriting in first group of pixel of a known person's handwriting, described device comprises:

A) setting this first pixel in order to the starting point is that other pixels in a reference pixel (Pr) and the group will be for being selected the device of the candidate pixel of sending;

B), judge that spacing between reference pixel and the candidate pixel is whether greater than the device of default critical value (Smin) in order to for each continuous candidate pixel in the group;

C) device of the described candidate pixel of elimination is if this spacing is less than this critical distance;

D) choose described candidate pixel and send, and the device of the new reference pixel that this pixel that is selected is set, if this spacing is not less than this critical value; And

E) device that this first pixel is sent with this candidate pixel of choosing.

43. as the described device of one of claim 28-42, comprise more that wherein group according to the pixel that receives continuously in the default acquisition time is arranged in the device of the pixel that input end obtains, and because for the ease of after one group of pixel is closelyed follow last group pixel, do not have to manage under the discontinuous situation in person's handwriting, this device comprises:

A) to set the pixel of sending at last of this last group of pixel be a reference pixel (Pr) in the starting point, and the pixel of follow-up group is to choose the device of the candidate pixel of sending (Pi);

B), judge that spacing between reference pixel and candidate pixel is whether greater than the default device of range line from (Smin) that face in order to each continuous candidate pixel for present group;

C) device of elimination candidate pixel is if this spacing is less than this critical distance;

D) choose described candidate pixel and send, and with this candidate pixel that is selected set as the device of new reference pixel, if this spacing is not less than this critical distance; And

E) with the candidate pixel that is selected in this group, the device that sends together with indication that relevant first pixel with this candidate pixel that is selected is linked to last pixel of last group of pixel.

44. as the described device of one of claim 28-43, comprise more that wherein group according to the pixel that receives continuously is arranged in the device of the pixel that an input end obtained in a default acquisition time, when being interrupted, continuous pixel makes and only obtains a pixel in last interrupted acquisition time that then these means are sent this single pixel methodically.

45. as the described device of one of claim 28-44, wherein this device is connected to an interactive screen (6), this interactive screen comprises a display screen and a coordinate deriving means that is integrated into this display screen, the pixel of obtaining in an input is to obtain from the position data that this coordinate deriving means is provided, and the pixel of this transmission is sent to this display screen.

46. as the described device of one of claim 28-45, wherein this pixel that is selected is sent at least one receiving end (2), source (6) a good distance off of this receiving end and the pixel of obtaining in input.

47. as the described device of one of claim 28-46, wherein more comprise and pass on this pixel of sending, source (6) a good distance off of this receiving end and the pixel of obtaining in input to the device of at least one receiving end (2).

48. a fax writing station (2) comprises a pixel dispensing device according to claim 1.

49. as the described device of one of claim 28-48, wherein more be included in the device that inserts at least one message that comprises the data except that pixel (Pi) between the two packet pixels (MPk), last pixel of a packet plans to be linked to first pixel of another packet to represent a continuous person's handwriting.

50. a device that receives the pixel that device according to claim 28 optionally transmits comprises:

A. receive the device of each pixel of sending;

B. if the pixel of a series of reception, the pixel that decision must link together is to form the device of a continuous person's handwriting; And

C. for each pixel that will be bonded, produce a straight-line segment and link this pixel, so that at the device of wanting to form between connected this pixel a continuous person's handwriting to the previous pixel in this a succession of pixel.

Images